EXAMINATIONS COUNCIL OF SWAZILAND Swaziland General Certificate of Secondary Education

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1 EXAMINATIONS COUNCIL OF SWAZILAND Swaziland General Certificate of Secondary Education CANDIDATE NAME CENTRE NUMBER CANDIDATE NUMBER PHYSICAL SCIENCE 6888/01 Paper 1 Short Answers October/November hour Candidates answer on the Question Paper. No Additional Materials are required. READ THESE INSTRUCTIONS FIRST Write your Centre number, candidate number and name on all the work you hand in. Write in blue or black pen in the spaces provided on the Question Paper. You may use an HB pencil for any diagrams, graphs, tables or rough working. Do not use staples, paper clips, highlighters, glue or correction fluid. Do not write on the barcode Answer all questions. You may use an electronic calculator. You may lose marks if you do not show your working or if you do not use the appropriate units. A copy of the Periodic Table is printed on page 9. The number of marks is given in brackets [ ] at the end of each question or part question. This document consists of 9 printed pages and 3 blank pages. ECOS 2016 [Turn over

2 2 1 As a candle burns, both physical and chemical changes take place. Identify these changes. physical change... chemical change... 2 Fig. 2.1 shows a circuit diagram with meters A 1 and A 2, battery B, switch S and resistor R. B A 2 A 1 S R Fig. 2.1 (a) Name the type of meter represented by meters A 1 and A 2. (b) The reading of meter A 1 is 0.3 A. State the reading of meter A 2.

3 3 Fig. 3.1 represents a nucleus of element X. 3 Fig. 3.1 key proton neutron (a) Which of the following notations represents an atom of this element? Circle the letter of the correct answer. A 3 4 X B 4 3 X C 7 3 X D 7 4 X [1] (b) Identify element X from the Periodic Table. 4 Fig. 4.1 shows two metal spheres, A and B. Sphere A is connected to the Earth. Sphere B is positively charged. A B Fig. 4.1 Sphere B is brought into contact with sphere A. Describe and explain what happens when sphere B is brought into contact with sphere A [2] [Turn over

4 4 5 Explain why some electric light bulbs are filled with argon gas Fig. 6.1 shows a bar magnet. Draw magnetic field lines around the magnet. N S Fig. 6.1 [2] 7 Hydrogen burns in air to produce a clean product. (a) Name this product. (b) Hydrogen is used in food production. Name one food product in which hydrogen is used in its manufacture. 8 Complete the following statement: Gamma rays can pass through paper and aluminium but can be greatly reduced by a few centimetres of... [1]

5 5 9 Soft and hard water differ by the metallic ions dissolved in them. (a) Name one metal ion present in hard water. (b) State one advantage of hard water. 10 Convert the following quantities into the required units. (a) 981 cm / s 2 expressed in m / s m / s 2 [1] (b) 0.03 g expressed in kg.... kg [1] 11 A crystal of potassium permanganate is placed in a beaker of water. The purple colour of potassium permanganate gradually spreads throughout the water by diffusion. Explain, using the kinetic particle theory, how this process occurs [3] 12 (a) Explain what is meant by the moment of a force about a point. (b) State two effects of a force on a body at rest [2] [Turn over

6 6 13 Sodium and potassium are alkali metals with low densities. State two other physical properties of these metals, not usually found in other metals [2] 14 A stone of mass 36 g has a density of 1.8 g / cm 3. Calculate the volume of the stone.... cm 3 [2] 15 Complete Table 15.1 by stating the formula and type of bond present in hydrogen chloride and potassium oxide. Table 15.1 name of compound formula type of bond hydrogen chloride potassium oxide K 2 O [3]

7 7 16 Fig shows the velocity-time graph for a moving object during a period of 12 seconds. velocity m / s time / s Fig (a) Determine the time interval during which the object is moving with positive acceleration. (b) Calculate the distance moved by the object in the first 4 seconds.... [2] 17 A list of gases is shown below. chlorine methane nitrogen oxygen sulfur dioxide gases from the list to answer the following questions. You may use any of the gases once, more than once or not at all. Name the gas that: (a) causes acid rain,... [1] (b) is used in welding,... [1] (c) is the main constituent of natural gas.... [1] [Turn over

8 8 18 Fig shows an arrow placed in front of a plane mirror. Fig Draw, on Fig. 18.1, as accurately as possible, the image of the arrow formed by the plane mirror. [3]

9 The volume of one mole of any gas is 24 dm 3 at room temperature and pressure (r.t.p.). b b = atomic (proton) number Key X X = atomic symbol 232 Th Thorium 90 Pa Protactinium 91 U Uranium 92 Np Neptunium 93 Pu Plutonium 94 Am Americium 95 Cm Curium 96 Bk Berkelium 97 Cf Californium 98 Es Einsteinium 99 Fm Fermium 100 Md Mendelevium 101 No Nobelium 102 Lr Lawrencium 103 a a = relative atomic mass * Lanthanoid series Actinoid series 140 Ce Cerium Pr Nd Praseodymium Neodymium Pm Promethium Sm Samarium Eu Europium Gd Gadolinium Tb Terbium Dy Dysprosium Ho Holmium Er Erbium Tm Thulium Yb Ytterbium Lu Lutetium 71 Fr Francium 87 Ra Radium Ac Actinium Cs Caesium Ba Barium La Lanthanum 57 * 178 Hf Hafnium Ta Tantalum W Tungsten Re Rhenium Os Osmium 76 Iridium Ir 195 Pt Platinum Au Gold Hg Mercury Tl Thallium Pb Lead 82 Bismuth Bi Po Polonium 84 At Astatine 85 Rn Radon Rb Rubidium Sr Strontium Y Yttrium Zr Zirconium Nb Niobium Mo Molybdenum 42 Tc Technetium Ru Ruthenium Rh Rhodium Pd Palladium Ag Silver Cd Cadmium 48 Indium In 119 Sn Tin Sb Antimony Te Tellurium 52 Iodine I 131 Xe Xenon K Potassium Ca Calcium Sc Scandium Ti Titanium V Vanadium Cr Chromium Mn Manganese Fe Iron Co Cobalt Ni Nickel Cu Copper Zn Zinc Ga Gallium Ge Germanium As Arsenic Se Selenium Br Bromine Kr Krypton Na Sodium Mg Magnesium Al Aluminium Si Silicon P Phosphorus S Sulfur Cl Chlorine Ar Argon Li Lithium 9 Be Beryllium 4 11 B Boron 12 C Carbon 14 N Nitrogen O Oxygen 19 F Fluorine 9 20 Ne Neon 10 1 H Hydrogen He Helium I II III IV V VI VII 0 Group DATA SHEET The Periodic Table of the Elements

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